TITLE:   GCN CIRCULAR
NUMBER:  45914
SUBJECT: GRB 261011A: Liverpool Telescope optical observations
DATE:    26/10/12 00:58:10 GMT
FROM:    A. Bochenek at Liverpool John Moores University <a.m.bochenek@2023.ljmu.ac.uk>

A. Bochenek, D. A. Perley (LJMU), report:
 
We observed the field of GRB 261011A (Huang et al., GCN 45895; Cenko et al., GCN 45896) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 8x100s exposures in SDSS gr filters, starting at 2026-10-11 23:08:04 UT, approximately 9.36 hours after Swift trigger. 
 
We detect a counterpart in the stacked images, at a position consistent with that reported by Cenko et al. (GCN 45896). Photometry is given below; the g-band detection is tentative.


| MJD (mid)    | T_mid-T_0    | Filter    | Mag. (AB)    |
| ------------ | ------------ | --------- | ------------ |
| 61324.97054  | 9.51 h       | g         | 22.46 ± 0.29 |
| 61324.98405  | 9.84 h       | r         | 21.98 ± 0.16 |

 
The photometry is in the AB magnitude system, was calibrated using nearby PanSTARRS secondary standards and was not corrected for extinction.